9-10-111 Limited Exemption, Small Units: The requirements of Sections 9-10-301, 302, 303, and 305 shall
not apply to the use of any small units, provided the requirements of Section 9-10-306 are satisfied.

9-10-112 Limited Exemption, Low Fuel Usage: The requirements of Sections 9-10-301, 302, 303, and 306 shall
not apply to the use of any boiler, steam generator, or process heater that has an annual heat input less than
90,000 therms during each consecutive 12-month period or that accepts a condition in their operating permit limiting
the annual heat input to less than 90,000 therms, provided the requirements of Sections 9-10-306 and 502.2 are
satisfied.

9-10-202 Boiler or Steam Generator: Any combustion equipment used to produce steam or heat water.

9-10-203 British Thermal Unit (BTU): The amount of heat required to raise the temperature of one pound of
water from 59 oF to 60 oF at one atmosphere.

9-10-204 CO Boiler: Any boiler or furnace which processes the off-gases from a catalytic cracking unit regenerator
or a coker burner.

9-10-205 Combustion Modification: Any modification of the burner, combustion air flow (including flue-gas
recirculation), or fuel-flow system which reduces nitrogen oxide emissions.

9-10-206 Heat-Input: The heat of combustion released due to burning a fuel in a source, using higher heating
value of the fuel. This does not include the sensible heat of incoming combustion air. In the case of carbon monoxide
boilers, the heat input includes the sensible heat of regenerator off-gases and the heat of combustion of the incoming
carbon monoxide and of the auxiliary fuel.

9-10-207 Higher Heating Value (HHV): The total heat liberated per mass of fuel burned (BTU per pound) when
fuel and dry air at standard conditions undergo complete combustion and all resultant products are brought to their
standard states at standard conditions per Section 9-10-604.

9-10-214 Process Heater: Any combustion equipment that transfers heat from combustion gases to water or
process streams.

9-10-215 Rated Heat Input: The heat input capacity specified on the nameplate of the combustion source.
If the combustion source has been physically modified and/or operated in such a manner that its maximum heat input
is different from the heat input capacity specified on the nameplate, then the modified maximum heat input per
Section 9-10-503 shall be considered as the rated heat input.

9-10-216 Refinery-wide Emission Rate: The ratio of the total mass of discharge into the atmosphere of nitrogen
oxides, in pounds, from affected units, excluding CO boilers, to the sum of the actual heat input to those units
in million BTU, calculated over a twenty-four (24) hour operating day.

9-10-217 Small Unit: Any refinery boiler, steam generator, or process heater with a rated heat input less
than 10 million BTU/hour but greater than or equal to 1 million BTU/hour that has the capability of firing any
fuel other than natural gas or liquefied petroleum gas.

9-10-218 Start-up or Shutdown: Start-up is that period of time, not to exceed twelve (12) hours unless specifically
extended by a permit condition, during which a unit is brought up to its normal operating temperature from a cold
start, initially at zero fuel flow, by following a prescribed series of separate steps or operations. Shutdown
is that period of time, not to exceed nine (9) hours unless specifically extended by a permit condition, during
which a unit is taken out of service from a normal operating mode to an inactive status following a prescribed
series of separate steps or operations.

9-10-219 Therm: One hundred thousand (100,000) BTUs.

9-10-220 Unit: Any petroleum refinery boiler, steam generator, or process heater, as defined in Sections
9-10-202 and 214 of this Section, having an Authority to Construct or a Permit to Operate prior to January 5, 1994.

9-10-300 STANDARDS

9-10-301 Emission Limit For Facility, NOx: Except as provided in Section 9-10-403, effective
July 1, 1997, a person shall not exceed a refinery-wide emission rate from affected units, excluding CO boilers,
of 0.033 pounds NOx per million BTU of heat input, based on an operating-day average. Affected units
that are undergoing start-up or shutdown and affected units that are out of service are included in the refinery-wide
emission rate as follows:

301.1 Units in Start-up or Shutdown: For the purposes of determining compliance with the emission limit of Section
9-10-301, the contribution of each affected unit that is in a start-up or shutdown period shall be calculated from
the unit's NOx emission rate, as measured by the initial source test required by Section 9-10-501 or
a more recent compliance source test, for that unit at the capacity during the source test.

301.2 Units Out of Service: For the purposes of determining compliance with the emission limit of Section 9-10-301,
the contribution of each affected unit that is out of service for repairs, maintenance, and/or inspection shall
be taken as the operating-day average of NOx emissions at the average heat input over the previous thirty
(30) day period. This calculation procedure shall be utilized no more than sixty (60) days for any one unit in
a calendar year.

301.3 Units Test-Fired On Non-Gaseous Fuel: For the purposes of determining compliance with the emission limit
of Section 9-10-301, the contribution of each affected unit that is fired on non-gaseous fuel for equipment testing
shall be taken as the operating-day average of NOx emissions at the average heat input over the previous
thirty (30) day period. Equipment testing shall not exceed a total of forty-eight (48) hours during any calendar
year for any one unit.

9-10-302 Interim Emission Limit For Facility: Effective July 1, 2000, NOx emissions from affected
units, excluding CO boilers, that represent at least 50 percent of the total heat input capacity shall average
less than or equal to 0.033 pound per million BTU. This Section applies only to those refineries that meet the
compliance date extension allowance requirements of Section 9-10-403.

9-10-303 Interim Emission Limit For Facility (Federal Requirements): Effective May 31, 1995, a person shall
not exceed a refinery-wide emission rate from affected units, excluding CO boilers, of 0.20 pounds NOx
per million BTU of heat input, based on an operating-day average.

303.1 Effective May 31, 1995, except during start-up and shutdown, a person shall not shall not operate a CO
boiler unless the emissions of nitrogen oxides (NOx) do not exceed 300 ppm, dry at 3% oxygen, based
on an operating-day average.

9-10-304 Emission Limit For CO Boilers, NOx: Except as provided in Section 9-10-403, effective July 1,
1997, except during start-up and shutdown, a person shall not operate a CO boiler unless at least one of the following
is met:

304.1 Emissions of nitrogen oxides (NOx) do not exceed 150 ppm, dry at 3% oxygen, based on an operating-day
average; or

304.2 Emissions of nitrogen oxides (NOx) are controlled by an emission control system with a NOx
control efficiency of at least 50 percent by weight.

9-10-305 Emission Limit For Each Affected Unit, CO: Except as provided in Section 9-10-403, effective
July 1, 1997, a person shall not operate an affected unit unless carbon monoxide emissions of 400 ppmv, dry at
3% oxygen, based on an operating-day average, are not exceeded.

9-10-306 Small Unit Requirements: Except as provided in Section 9-10-403, effective July 1, 1997, a person
shall not operate a small unit unless at least one of the following is met:

306.1 Operate in a manner that maintains stack-gas oxygen concentrations at less than or equal to 3 percent
by volume on a dry basis; or

306.2 Tune at least once every twelve (12) months, or within two weeks of unit start-up if not operated in the
last twelve (12) months, by a technician in accordance with the procedure specified in Section 9-10-605; or

9-10-401 Control Plan Submittal: A person subject to Sections 9-10-301, 302, 304, and 305 of this Rule
shall comply with the following increments of progress:

401.1 No later than twenty-four (24) months prior to the respective dates of Sections 9-10-301, 302, 304, and
305, submit to the APCO a control plan detailing the proposed measures to be taken in order to meet the requirements
of Sections 9-10-301, 302, 304, and 305. The control plan shall contain, at a minimum:

1.1 A list of all affected units, including the manufacturer, model number, and the maximum rated capacity for
each unit.

1.2 A description of each affected unit and the Nox control system proposed for each unit, including type and
design principles, as well as a description of any ancillary equipment related to the control emissions. Data on
the expected performance of the NOx control system shall also be included;

1.4 The proposed mass rate of nitrogen oxides emissions for each CO boiler that will achieve the emission rate
specified in Section 9-10-304; and

1.5 A proposed implementation schedule for each affected unit, including but not limited to specific dates for
the following events: final engineering, contract award, construction, and final compliance.

401.2 No later than eighteen (18) months prior to the respective dates of Sections 301, 302, 304, and 305, submit
applications for all Authorities to Construct required for compliance with the respective sections of this Rule.

9-10-402 Control Plan Submittal, Small Units: A person subject to Section 9-10-306 of this Rule shall
comply with the following increments of progress:

402.1 No later than twelve (12) months prior to the compliance date of Section 306, submit to the APCO a plan
to comply with the requirements of Section 9-10-306. The plan shall contain, at a minimum:

1.1 A list of all sources with the rated heat input capacities; and

1.2 A selection on one of the three options specified in Subsection 306.1, 306.2 and 306.3.

9-10-403 Compliance Date, Clean-Fuel Extension Allowance: Notwithstanding the effective dates specified
in Sections 9-10-301, 304, 305, and 306, affected facilities that are in the process of, or have completed, making
modifications to comply with the State Phase II Reformulated Gasoline Requirement (California Code of Regulations,
Section 2260 et seq.) and the Federal Reformulated Gasoline Requirement (1990 Clean Air Act, 42 U.S.C.A., Section
7545) shall meet a compliance date of July 1, 2002. Effective July 1, 1997, any affected facility not producing
the state and federal clean fuels shall comply with the effective dates in Sections 9-10-301, 304, 305, and 306.

403.1 Commencing six (6) months after January 5, 1994, and every six months thereafter until clean-fuels project
completion, facilities shall submit a status report verifying progress toward compliance with state and federal
clean-fuel requirements.

9-10-500 MONITORING AND RECORDS

9-10-501 Initial Demonstration of Compliance: All units identified in the control plan of Section 9-10-401
shall be tested for nitrogen oxide and carbon monoxide emissions while firing gaseous fuel and non-gaseous fuel,
if applicable, at the maximum rated capacity or as near thereto as practicable. Such tests shall be performed:

501.1 Within one hundred and eighty (180) days after completion of modifications, but no later than thirty (30)
days prior to the respective dates of Sections 301,304, and 305 for units which are to be modified with nitrogen
oxide control equipment; and

501.2 No later than six (6) months prior to the respective dates of Sections 301, 304, and 305 for units which
do not require modification.

9-10-502 Monitoring: A person subject to Sections 9-10-301, 304, and 305 shall submit to the APCO a monitoring
plan to provide, properly install, maintain in good working order, and operate the following equipment:

9-10-503 Modified Maximum Heat Input: Any unit that has been physically modified such that its maximum
heat input is different than the heat input specified on the nameplate shall demonstrate to the APCO the maximum
heat input while operating the source at maximum capacity.

9-10-504 Records: A person subject to the requirements of Sections 9-10-301, 304, and 305 shall maintain
permanent hourly continuous emission monitoring or equivalent system parameter records and fuel-rate records, in
a form suitable for inspection for a period of at least two (2) years. Such records shall be retained for a minimum
of twenty-four (24) months from date of entry and made available to the APCO upon request. These records shall
include, but are not limited to:

504.1 The continuous emission monitoring measurements or equivalent system parameters for NOx, CO,
and O2 in ppmv and lb/hour;

504.2 The type, quantity (BTU/hr), and higher heating value of fuel burned and the injection rate for any reactant
chemicals used by the emission control system(s) on a daily basis.

504.3 The date, time, and duration of any start-up, shutdown or malfunction in the operation of any unit, emission
control equipment, or emission monitoring equipment; and

504.4 The results of performance testing, evaluations, calibrations, checks, adjustments, and maintenance of
any continuous emission monitors that have been installed pursuant to Section 9-10-502 of this Rule.

9-10-505 Reporting Requirements: A person subject to the requirements of Sections 9-10-301, 304, and
305 shall meet the following reporting requirements:

505.1 Report to the APCO any violation of Section 9-10-301, 304 and/or 305, in writing within ninety-six (96)
hours after such occurrence.

505.2 Submit a written report for each calendar quarter to the APCO. The report shall be due on the 30th day
following the end of the calendar quarter and shall include:

2.1 A summary of the data obtained from the CEMS and the fuel meters installed pursuant to Section 9-10-502;
and

2.2 The date, time, duration, and magnitude of emissions in excess of the appropriate standards required by
Sections 9-10-301 and 304; the nature and cause of the excess (if known); the corrective actions taken; and the
preventive measure adopted.

9-10-600 MANUAL OF PROCEDURES

9-10-601 Determination of Nitrogen Oxides: Compliance with the nitrogen oxide emission requirements of
Sections 9-10-301 and 304 shall be determined by continuous emission monitors that have been installed, or by equivalent
verification system pursuant to Section 9-10-502, and meet the requirements of Volume V of the District Manual
of Procedures. CEMS shall be verified by source test as set forth in the District Manual of Procedures, Volume
IV, ST-13A or B (nitrogen oxides) and ST-14 (oxygen).

9-10-602 Determination of Carbon Monoxide and Stack-Gas Oxygen: Compliance with the carbon monoxide emission
requirements of Sections 9-10-305 shall be determined by continuous emission monitors that have been installed,
or by equivalent verification system pursuant to Section 9-10-502, and meet the requirements of Volume V of the
District Manual of Procedures. CEMS shall be verified by source test as set forth in the District Manual of Procedures,
Volume IV, ST-6 (carbon monoxide) and ST-14 (oxygen).

9-10-603 Compliance Determination: All emission determinations shall be made in the as-found operating condition,
except during periods of start-up or shutdown as specified by Section 9-10-218. In addition to any continuous monitoring
system (CEMS) required by Sections 9-10-502, 601, and 602, emission determinations shall include at least one source
test, as specified in Section 9-10-501.

9-10-604 Determination of Higher Heating Value: If certification of the higher heating value is not provided
by the third-party fuel supplier, it shall be determined by one of the following test methods: (1) ASTM D2015-85
for solid fuels; (2) ASTM D240-87 or ASTM D2382-88 for liquid hydrocarbon fuels; or (3) ASTM D1826-88 or ASTM D1945-81
in conjunction with ASTM D3588-89 for gaseous fuels.

9-10-605 Tune-Up Procedures: The tuning procedure required by Section 9-10-306.2 shall be performed in accordance
with the procedure set forth in the District Manual of Procedures, Volume I, Chapter 5.